I was wondering that, myself. But then, one of the organizers of the conference was on the skepticism panel . . .

Even more reason to, then. Other organizers may need some evidence from attendees to make changes. Worst case scenario is they blow you off, right? You don't lose anything. I suppose it's possible they could try to black-ball you from the conference. If you'd like to go back, that would be a problem. But as long as you present it similarly to the way you did here, without insults, there hopefully won't be any backlash.